diff --git a/.readthedocs.yml b/.readthedocs.yml
index c6869239..5cbbda17 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -5,5 +5,4 @@ python:
   version: 3
   pip_install: true
   extra_requirements:
-    - alldeps
-    - doc
+    - dev
diff --git a/.travis.yml b/.travis.yml
index 9cf279cc..abc735d3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,8 +22,8 @@ addons:
     - libqt5gui5  # pyqt5>5.11 fails to load the xcb platform plugin without it
 
 install:
-  - pip install -U --upgrade-strategy eager .[alldeps,test,doc]
-  # Update dependencies (e.g. numpy formatting changed in v1.14).
+  - pip install --upgrade --upgrade-strategy eager .[dev]
+  # Upgrade to test with the latest version of our dependencies.
 
 script:
 # - make lint
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 63604dcf..f2ed7790 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -14,7 +14,7 @@ The package can be set up (ideally in a virtual environment) for local
 development with the following::
 
     $ git clone https://github.com/epfl-lts2/pygsp.git
-    $ pip install -U -e pygsp[alldeps,test,doc,pkg]
+    $ pip install -U -e pygsp[dev]
 
 You can improve or add functionality in the ``pygsp`` folder, along with
 corresponding unit tests in ``pygsp/tests/test_*.py`` (with reasonable
diff --git a/doc/history.rst b/doc/history.rst
index fa6cd4d6..d1a1c15a 100644
--- a/doc/history.rst
+++ b/doc/history.rst
@@ -24,6 +24,7 @@ History
 * New implementation of the Sensor graph that is simpler and scales better.
 * A new learning module with three functions to solve standard semi-supervised
   classification and regression problems.
+* Merged all the extra requirements in a single dev requirement.
 
 Experimental filter API (to be tested and validated):
 
diff --git a/postBuild b/postBuild
index 6eb53a4d..e1530e8e 100755
--- a/postBuild
+++ b/postBuild
@@ -1,3 +1,3 @@
 #!/bin/bash
 # Tell https://mybinder.org to simply install the package.
-pip install .[alldeps]
+pip install .[dev]
diff --git a/setup.py b/setup.py
index e1b6419f..3fd7e2cb 100644
--- a/setup.py
+++ b/setup.py
@@ -31,8 +31,9 @@
         'scipy',
     ],
     extras_require={
-        # Optional dependencies for some functionalities.
-        'alldeps': (
+        # Optional dependencies for development. Some bring additional
+        # functionalities, others are for testing, documentation, or packaging.
+        'dev': [
             # Import and export.
             'networkx',
             # Construct patch graphs from images.
@@ -51,22 +52,16 @@
             'PyQt5; python_version >= "3.5"',
             # No source package for PyQt5 on PyPI, fall back to PySide.
             'PySide; python_version < "3.5"',
-        ),
-        # Testing dependencies.
-        'test': [
+            # Run the tests.
             'flake8',
             'coverage',
             'coveralls',
-        ],
-        # Dependencies to build the documentation.
-        'doc': [
+            # Build the documentation.
             'sphinx',
             'numpydoc',
             'sphinxcontrib-bibtex',
             'sphinx-rtd-theme',
-        ],
-        # Dependencies to build and upload packages.
-        'pkg': [
+            # Build and upload packages.
             'wheel',
             'twine',
         ],